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Old 21st February 2012, 09:00 PM   #401
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I mean, imagine them back to back
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Old 21st February 2012, 09:11 PM   #402
labjr is offline labjr  United States
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Now we're talking! Looks good!

Just a couple small concerns. Are the outputs far enough apart? And do any power traces need to be heavier?
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Old 21st February 2012, 09:14 PM   #403
ra7 is offline ra7  United States
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What is the difference between connecting the input board to the output board and connecting individual FETs to the single board? I say keep it the way it was and people can just run wires to the FETs if they need more heatsink.
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Old 21st February 2012, 09:30 PM   #404
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Quote:
Originally Posted by UKToecutter View Post
N Channel board - P Channel board
You realise a single board for P- and N-channel is an option ?

e.g. add a 4th pad for the common cathode diode : solder the diode on the first three pads of one board, to last three on the other.
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Old 21st February 2012, 09:47 PM   #405
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by AudioSan View Post
does it? when the stereo amp must be 4x taller? thats twice as much heatsinks as for 2 monoblocks. and the heatsinks are the most expensive part of the chassis. only topp and bottom plates that will be more expensive on monoblocks. and thats about 30$.
Again your math is well ...

Mono means two chassis , not only xtra top and bottom , means 2 face plates , 2 rear plates. Price it out , it is very similar in cost to 2 stereo chassis. Separate PCB, now requires 4 PCB /Ch 8 to do stereo , you must be using the same calculators as used by current economic leaders ...


To do as purpose is more costly ...........
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Old 21st February 2012, 09:50 PM   #406
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Quote:
Originally Posted by jacco vermeulen View Post
You realise a single board for P- and N-channel is an option ?

e.g. add a 4th pad for the common cathode diode : solder the diode on the first three pads of one board, to last three on the other.
Jacco,

Maybe, but then the inputs and outputs will end up at opposite ends of the chassis.

Andy
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Old 21st February 2012, 10:03 PM   #407
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Not if U3, U4, U5, and U7 are all there.
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Old 21st February 2012, 10:05 PM   #408
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Quote:
Originally Posted by a.wayne View Post
Again your math is well ...

Mono means two chassis , not only xtra top and bottom , means 2 face plates , 2 rear plates. Price it out , it is very similar in cost to 2 stereo chassis. Separate PCB, now requires 4 PCB /Ch 8 to do stereo , you must be using the same calculators as used by current economic leaders ...


To do as purpose is more costly ...........
lets take it more spesific.
stereo amp:
4pc. 10x12" heatsinks
1pc. 17x12" front
2pc. 20x11" topp/bottom
1pc. 11x12" back

1 monoblock:
4pc. 10x3" heatsinks
1pc. 17x3" front
2pc. 20x11" topp/bottom
1pc. 11x3" back

2 monoblocks ARE cheeper. and can handel the same amount of power as that one stereo amp. 2pc. of monoblocks use total of 10x24" heatsinks. and 17x6" front/back.

stereoamp use total of 10x48" heatsinks and total of 17x12" front/back.
how the hell can a stereo amp be cheeper?
in either case, you need 2ch ampboard, 2 pc PSUboards and 2 pc of 800VA transformer is most likely the same(ish) price as one 1500VA.

Last edited by AudioSan; 21st February 2012 at 10:08 PM.
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Old 21st February 2012, 10:13 PM   #409
Horio is offline Horio  United States
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Looking great! The more I think about it, the more I prefer having the input and output boards separated.

Can you add some mounting holes to both boards? Also, any way you might be able to setup the PS Board to accept Fukushima MPC74 type power resistors? I'm finishing up a big GB for these resistors, and I'm about to mail out 900 of these things. I have a feeling a few members might want to use it on your PS Board.
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Old 21st February 2012, 10:14 PM   #410
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Quote:
Originally Posted by jacco vermeulen View Post
Not if U3, U4, U5, and U7 are all there.

Hmm. Looking at that now.....
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